JLPT N1 Shinkanzen Grammar Lesson 5: ～いかんだ・～いかんにかかわらず・～をものともせず (Depending on... / Regardless of... / Despite...)

Explanation: Means that the result in the second clause changes or is determined depending on the state or degree of N in the first clause.
✓ Often used with nouns that can vary widely, such as ideas, performance, results, or attitude. The following clause commonly expresses a major possible change or a decisive outcome.

Explanation: In contrast to pattern 1, this means that what follows happens regardless of the condition of N; it is completely independent of and unaffected by N.
✓ Often used with nouns having a range of possible states or degrees, such as results, reasons, or performance.

Explanation: Describes someone boldly acting despite an obstacle that would normally defeat or discourage people, such as a storm, illness, or danger.
✓ The sentence praises another person's courage and bravery. Therefore, this pattern is NOT normally used to describe one's own actions.

Explanation: Describes ignoring surrounding concerns, opposition, criticism, or expectations and continuing to act as one wishes, as if those matters had nothing to do with oneself.
✓ The sentence often conveys the speaker's surprise, shock, or admiration at such behavior.

Explanation: Means: “If it were situation A, that result might be reasonable or forgivable; but the actual situation is B, which is completely different, so it is unacceptable.”
✓ Often uses an extreme example as a possible excuse, such as people long ago, children, or a cheap hotel. The following clause presents a sharply contrasting reality and clearly expresses dissatisfaction or surprise.